Source : WordNet®

uncongenial
     adj 1: not suitable to your tastes or needs; "the uncongenial
            roommates were always fighting"; "the task was
            uncongenial to one sensitive to rebuffs" [syn: {incompatible}]
            [ant: {congenial}]
     2: very unfavorable to life or growth; "a hostile climate"; "an
        uncongenial atmosphere"; "an uncongenial soil"; "the
        unfriendly environment at high altitudes" [syn: {hostile},
         {unfriendly}]
     3: used of plant stock or scions; incapable of being grafted